35 Ill. Adm. Code 6110.611.720
Analytical Methods
TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.720 ANALYTICAL METHODS
Section 611.720 Analytical Methods
a) A
certified laboratory must use specific methods or alternative methods the
Agency approved under Section 611.480 to determine whether the supplier
complies with Section 611.330.
1) Gross
Alpha and Beta
A)
Evaporation Methods
.
SM 302
(71); SM 7110 B (85); SM 7110 B (91); SM 7110 B (96); SM 7110 B (00); SM 7110 B
(21); USEPA 900.0 (80); USEPA 900.0 (18);
USEPA
00-01 (84)
;
USEPA IRM
(76), pages 1-3
; USEPA RCA (79), pages 1-5; or USGS R1120-76.
B)
Liquid Scintillation Methods
.
ASTM
D7283-17,
SM 7110 D (17)
, or SM 7110 D (21).
2) Gross
Alpha. Coprecipitation Methods. SM 7110 C (91), SM 7110 C (96), SM 7110 C (00),
SM 7110 C (21) or USEPA 00-02 (84).
3) Radium-226
A) Radiochemical
Methods.
ASTM D2460-97; ASTM D2460-07
;
Georgia Radium (04)
; New York Radium (82);
SM 304
(71);
SM 7500-Ra B (88);
SM 7500-Ra B (93); SM 7500-Ra B (01)
;
USEPA 903.0 (80)
; USEPA 903.0(21);
USEPA Ra-03 (84)
; USEPA IRM (76), pages 13-15; USEPA
RCA (79), pages 19-32; or
USGS R-1140-76
.
B)
Radon Emanation
Methods.
ASTM
D3454-97; ASTM D3454-05
;
ASTM D3454-18; ASTM D3454-21;
EML (97) Ra-04; EML (90) Ra-05
; SM 305 (71);
SM
7500-Ra C (88);
SM 7500-Ra C (93); SM 7500-Ra C (01)
;
USEPA 903.1 (80)
;
USEPA 903.1 (21); USEPA Ra-04 (84)
; USEPA IRM (76),
pages 16-23; or
USGS R-1141-76
.
C) Gamma
Spectrometry.
SM 7500-Ra E (01)
or SM 7500-Ra E
(07).
4) Radium-228
A) Radiochemical
Methods.
Georgia Radium (04)
;
New
Jersey Radium (90)
;
New
York Radium (82)
; SM 7500-Ra D (88); SM 7500-Ra D (93); SM 7500-Ra D (01);
USEPA 904.0 (80)
;
USEPA904.0 (22); USEPA Ra-05 (90)
; USEPA IRM (76),
pages 24-28;
USEPA RCA (79), pages 19-32
; or
USGS R-1142-76
.
B) Gamma
Spectrometry.
SM 7500-Ra E (01)
or SM 7500-Ra E
(07).
5) Uranium
A) Radiochemical
Methods.
SM 7500-U B (88), SM 7500-U B (91), SM 7500-U
B (96), SM 7500-U B (00)
, or
USEPA 908.0 (80)
.
B) Fluorometric
Methods.
ASTM D2907-97
, EML (90) U-04, EML (97) U-04, SM 7500-U
C (88), SM 7500-U C (91), SM 7500-U C (96), SM 7500-U C (00),
USEPA 908.1 (80)
,
USGS
R-1180-76, or USGS R-1181-76
.
C) ICP-MS
Methods.
ASTM D5673-03, ASTM
D5673-05, ASTM D5673-10
, ASTM D5673-16; SM 3125 (97); or
USEPA 200.8 (94)
.
D) Alpha
Spectrometry.
ASTM D3972-97; ASTM D3972-02; ASTM
D3972-09
;
EML (90) U-02;
EML (97) U-02
;
USEPA 00-07 (84)
; USEPA RCA (79),
pages 33-48; or
USGS R-1182-76
; 7500-U C (00).
E) Laser
Spectrometry.
ASTM D5174-97, ASTM D5174-02, or ASTM
D5174-07
.
F) Alpha
Liquid Scintillation Spectrometry. ASTM D6239-09.
BOARD NOTE: If the laboratory
determines uranium (U) by mass, it must use a conversion factor of 0.67 pCi/µg
U. This conversion factor reflects the characteristic 1:1 activity ratio of
234
U
and
238
U of naturally occurring uranium.
6) Radioactive
Cesium
A) Radiochemical
Methods
.
ASTM D2459-72
;
SM 7500-Cs B (88), SM 7500-Cs B (93); SM 7500-Cs B (00)
;
USEPA 901.0 (80)
; USEPA
IRM (76), pages 4-5; or
USGS R-1111-76
.
B) Gamma
Ray Spectrometry.
ASTM D3649-91; ASTM D3649-98a; ASTM
D3649-06
;
EML (90) Ga-01;
EML (97) Ga-01-R
; SM 7120 (94); SM 7120 (97);
SM
7120 (21); USEPA 901.1 (80);
USEPA RCA (79), pages 92-95
;
or
USGS R-1110-76
.
7) Radioactive
Iodine
A) Radiochemical
Methods.
ASTM D3649-91; ASTM D3649-98a; ASTM D3649-06
;
SM 7500-I B (88); SM 7500-I B (93); SM 7500-I B (00)
;
SM 7500-I C (88); SM 7500-I C (93); SM 7500-I C (00); SM 7500-I D (88); SM
7500-I D (93); SM 7500-I D (00);
USEPA 902.0 (80
);
USEPA IRM (76), pages 6-8; or USEPA IRM (76), pages 9-12
.
B) Gamma
Ray Spectrometry.
ASTM D4785-93; ASTM D4785-00a; ASTM
D4785-08
; ASTM D4785-20;
EML (90) Ga-01; EML (97) Ga-01-R; SM 7120
(94); SM 7120 (97);
SM 7120 (21); USEPA 901.1 (80)
;
or
USEPA RCA (79), pages 92-95
.
8) Radioactive
Strontium-89 and -90. Radiochemical Methods.
EML (90) Sr-01; EML (97) Sr-01; EML (90) Sr-02; EML (97)
Sr-02
; SM 303 (71);
SM 7500-Sr B (88); SM 7500-Sr B
(93); SM 7500-Sr B (01)
;
USEPA
905.0 (80)
;
USEPA Sr-04 (84)
; USEPA IRM (76),
pages 29-33;
USEPA RCA (79), pages 65-73
; or
USGS R-1160-76
.
9) Tritium.
Liquid Scintillation
.
ASTM
D4107-91; ASTM D4107-98; ASTM D4107-08
; ASTM D4107-20; SM 306 (71);
SM 7500-3H B (88); SM 7500-3H B (93); SM 7500-3H B (00)
;
SM
7500-
3
H B (22); USEPA 906.0 (80)
; USEPA H-02 (84); USEPA IRM
(76), pages 34-37; USEPA RCA (79), pages 87-91; or
USGS
R-1171-76
.
10) Gamma
Emitters.
Gamma Ray Spectrometry
.
ASTM D3649-91; ASTM D3649-98a; ASTM D3649-06
;
ASTM D4785-93; ASTM D4785-00a; ASTM D4785-08
;
ASTM D4785-20; EML (90) Ga-01;
EML (97) Ga-01-R
; SM 7120 (94); SM 7120 (97);
SM
7120 (21); SM 7500-Cs B (88); SM 7500-Cs B (93); SM 7500-Cs B (00)
;
SM 7500-I B (88); SM 7500-I B (93); SM 7500-I B (00)
;
USEPA 901.0 (80); USEPA 901.1 (80); USEPA 902.0 (80)
;
USEPA RCA (79), pages 92-95
; or
USGS
R-1110-76
.
b) When
the laboratory must identify and measure radionuclides other than those in
subsection (a), it must use methods from either of two sources, incorporated by
reference in Section 611.102, except if the Agency approves alternative methods
under Section 611.480:
1) USEPA
ARP (73).
2) EML (90)
or EML (97).
c) For
monitoring radioactivity concentrations in drinking water, a detection limit
defines the required sensitivity of the radio analysis. The detection limit is
the concentration a laboratory can measure with a precision of plus or minus
100 percent at the 95 percent confidence level (1.96σ, where σ is the
standard deviation of the net counting rate of the sample).
1) When
determining compliance with Section 611.330(b), (c), and (e), the detection
limit must not exceed certain concentrations:
Contaminant
Detection Limit
Gross alpha particle activity
3 pCi/L
Radium-226
1 pCi/L
Radium-228
1 pCi/L
Uranium
1 µg/L
BOARD NOTE: This subsection
(c)(1) derives from 40 CFR 141.25(c) Table B.
2) When
determining compliance with Section 611.330(d), the detection limits must not
exceed certain concentrations:
Radionuclide
Detection Limit
Tritium
1,000 pCi/L
Strontium-89
10 pCi/L
Strontium-90
2 pCi/L
Iodine-131
1 pCi/L
Cesium-134
10 pCi/L
Gross beta
4 pCi/L
Other radionuclides
1/10 of applicable limit
BOARD NOTE: This subsection
(c)(2) derives from 40 CFR 141.25(c) Table C.
d) When
determining compliance with the MCLs in Section 611.330, the laboratory must
use averages of data and round results to the same number of significant
figures as the MCL.
BOARD NOTE: This Section derives from 40 CFR 141.25 and
appendix A to subpart C of 40 CFR 141. The Board did not separately list approved
alternative methods from Standard Methods Online that are the same version as a
method appearing in a printed edition of Standard Methods. Using the Standard
Methods Online copy is acceptable.
Standard Methods Online, Methods
7110 B-91 and 7110 C-91
appear in the 18
th
and 19
th
editions as Methods 7110 B and 7110 C. These appear in
this Section as SM 7110 B (91) and SM 7110 C (91).
Standard Methods Online, Methods
7110 B-00 and 7110 C-00
appear in the 21
st
,
22
nd
, and 23
rd
editions as Methods 7110 B and 7110 C. These
appear in this Section as SM 7110 B (00) and SM 7110 C (00).
Standard
Methods Online, Methods 7110 D-17 appears in the 21
st
, 22
nd
,
and 23
rd
editions as Methods 7110 D. This appears in this Section
as SM 7110 D (00) and SM 7110 D (00).
Standard Methods Online, Method
7120-97
appears in the 20
th
, 21
st
,
22
nd
, and 23
rd
editions as Method 7120. This appears in
this Section as SM 7120 (97).
Standard Methods Online, Method
7500-Cs B-00
appears in the 21
st
, 22
nd
,
23
rd
, and 24
th
editions as Method 7500-Cs B. This
appears in this Section as SM 7500-Cs B (00).
Standard Methods Online, Methods
7500-I B-00, 7500-I C-00, and 7500-I D-00
appear in the 21
st
,
22
nd
, 23
rd
, and 24
th
editions as Methods
7500-I B, 7500-I C, and 7500-I D. These appear in this Section as SM 7500-I B
(00), SM 7500-I C (00), and SM 7500-I D (00).
Standard Methods Online, Methods
7500-Ra B-01, 7500-Ra C-01, and 7500-Ra D-01
appears in
the 21
st
, 22
nd
, 23
rd
, and 24
th
editions
as Methods 7500-Ra B, 7500-Ra C, and 7500-Ra D. These appear in this Section as
SM 7500-Ra B (01), SM 7500-Ra C (01), and SM 7500-Ra D (01).
Standard Methods Online, Methods
7500-Ra E-07
appears in the 22
nd
, 23
rd
,
and 24
th
editions as Method 7500-Ra E. This appears in this Section
as SM 7500-Ra E (07).
Standard Methods Online, Method
7500-Sr B-01
appears in the 21
st
, 22
nd
,
23
rd
, and 24
th
editions as Method 7500-Sr B. This appears
in this Section as SM 7500-Sr B (01).
Standard Methods Online, Method
7500-3H B-00
appears in the 21
st
, 22
nd
,
and 23
rd
editions as Method 7500-3H B. This appears in this Section
as SM 7500-3H B (00)
Standard Methods Online, Methods
7500-U B and 7500-U C-00
appear in the 21
st
,
22
nd
, 23
rd
, and 24
th
editions as Methods
7500-U B and 7500-U C. These appear in this Section as SM 7500-U B (00) and SM
7500-U C (00).